Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-09-28
Astronomy and Astrophysics
Astrophysics
To appear in "The Dynamics, Structure and History of Galaxies" (eds. G. S. Da Costa & E. M. Sadler) 10 pages, no figures, LaTe
Scientific paper
Dynamical mass discrepancies in galaxies have two possible explanations: the existence of large amounts of dark matter or the breakdown of Newtonian gravity. True dark matter halos of galaxies could differ in several respects from apparent halos inferred from misinterpreted modified gravity, and we discuss two observational tests to probe these differences. Modified gravity gives generic, geometrical predictions for the shapes of apparent halos, and also requires that the inferred excess mass strongly correlates with the visible baryonic mass. Thus modified gravity is more easily falsified, but we find both hypotheses to be consistent with the meager data on galaxy and cluster halos; dark matter is not required by current data. We strongly encourage the acquisition of more data, which could ultimately eliminate one or other of these possibilities.
Kosowsky Arthur
Sellwood Jeremy A.
No associations
LandOfFree
Distinguishing Dark Matter from Modified Gravity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Distinguishing Dark Matter from Modified Gravity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Distinguishing Dark Matter from Modified Gravity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-154996